Imperfections accounts to every model of communication, and quantum communication is not an exception. These imperfections results from decoherence, as discussed in previous section. Quantum communication suffers from environmental interactions and loss of photons carrying qubits and finally the information is lost. Decoherence also affects the quantum teleportation process as well as entanglement generation and distribution process. However, but there are also other operations that are applied to quantum states of quantum teleportation process, that further introduce imperfections in the teleported qubit [1]}.
